Beware on USB2 ports
Tried installing just the debugger piece of Win 8.1 Preview Edition of Win SDK for definite details and it crashed immediately. Not much interest in Redmond for "ancient" Win 7 I guess.
Getting 20+ MB/sec on USB3 port (direct); Price is good
On my HP Pavilion dv7 cto-6100 quad edition running Win 7 Ultimate the 16GB Ultra twice gave me a BSOD xfer'g 1GB video files on USB2 port; Speed dropped to 10 MB/sec; Then eventually BSOD; Froze other USB2 programs; Cruzers of similar size 8GB and 16GB never had a problem